Ionia Weather Forecast

    • 67
    • 82

    Rain Showers Likely

    • 60
    • 78

    Chance Rain Showers

    • 62
    • 78

    Chance Rain Showers

    • 56
    • 76

    Rain Showers Likely

    • 54
    • 73

    Partly Sunny

    • 58
    • 76

    Partly Sunny

Today 16 Aug Ontario

Sunny late this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Highs Ranging from the upper 70s on the Hilltops to the lower 80s across the lower Elevations. South Winds 10 Mph or Less, increasing to 10 to 15 Mph. Chance of rain 30 percent.

Tonight 16 Aug Ontario

Showers likely with a chance of Thunderstorms. Warmer and muggy with Lows in the upper 60s. South Winds 10 to 15 Mph, becoming light. Chance of rain 70 percent.

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Ionia Temperature Statistics

August Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 4 August, 2026

    57.7 °F

  • Average August

    73.6 °F

  • Highest 5 August, 2026

    87.7 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.6 °F
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